Countdown to Doomsday, I Became the Savior

On the first day of time traveling to the end of the world, I awakened the "Savior System". The system told me that as long as I save the world, I can return to my original life. I nodded excitedly, but froze when I saw the task list: "Task 1: Make the world-destroying villain fall in love with you." "Task two: get pregnant with his child." "Task 3: Kill him with your own hands before he dies." I looked at the madman who destroyed the world in the distance and fell into deep thought.